Information AboutCupronickel |
| CATEGORIES ABOUT CUPRONICKEL | |
| nickel alloys | |
| copper alloys | |
| coins | |
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A common use is in many silver-coloured modern circulation Coin s. A typical mix is 75% copper, 25% Nickel , and a trace amount of Manganese . In the past true Silver coins were Debased with cupronickel. It is used in Thermocouple s, and a 55% copper/45% nickel alloy is used to make very accurate Resistor s. Monel metal is a copper-nickel alloy, containing up to 65% nickel. See also Bronze (copper alloyed with Tin ), Brass (copper alloyed with Zinc ), and Nickel Silver (another group of copper-nickel alloys). HISTORY c. 170 BCE . Obv: Bust of Dionysos with a wreath of leaves. Rev: The cupronickel alloy technology has been known by the Chinese since the 3rd Century BC under the name "white copper" (some weapons from the Warring States Period were in copper-nickel alloy Ancient Chinese weapons and A halberd of copper-nickel alloy, from the Warring States Period. ). The , suggesting that exchanges of the metallic alloy, or possibly exchanges of technicians, were happening at the time between China and the region of Bactria . The practice of exporting Chinese metals, in particular Iron , for trade is attested around that period. Cupro-nickel was not used again in coinage until the 19th Century . Cupro-nickel is the Cladding on either side of United States Half Dollars (50¢) since 1971, and all Quarters (25¢) and Dimes (10¢) made after 1965. The United States Jefferson Nickel (5¢) coin is solid cupro-nickel (75/25 ratio). About the United States Mint: Coin Specifications Beginning around the turn of the 20th century, Bullet jackets were commonly made from this material. It was soon replaced with Gilding Metal to reduce metal fouling in the bore. REFERENCES EXTERNAL LINKS
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